Automobile condenser electric fan controller

Details Automobile condenser electric fan controller Automobile condenser electric fan controller

1993-07-27

1994-02-15

Kwon, John T.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

62184, B60H 132

Patent

active

052856500

ABSTRACT:
An automobile condenser electric fan controller, which includes a high pass filter, an inverted comparator, and a relay, the inverted comparator comparing the signal obtained from the high pass filter with a reference DC level signal made according to predetermined critical speed and then providing a high potential or low potential output according to the comparison result, whereby the relay is controlled to turn on the automobile's condenser electric fan as the output of the inverted comparator and the output of the automobile's compressor both are at high potential; the relay is controlled to turn off the automobile's condenser electric fan as the output of the inverted comparator and the output of the automobile's compressor both are at low potential, or either one is at high potential while the other is at low potential.

REFERENCES:
patent: 4858676 (1989-08-01), Bolfik et al.
patent: 4933614 (1990-06-01), Kawata
patent: 5022232 (1991-06-01), Sakamoto et al.
patent: 5167127 (1992-12-01), Ohtsu
patent: 5199272 (1993-04-01), Yamanaka et al.

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